A system does 100J work on surroundings by absorbing 150J of heat. Calculate the change in internal energy-

 

A sample of gas is compressed by an average pressure of 0.50 atmosphere so as to decrease its volume from 400 cm^3 to 200 cm3^.During the process 8.00 J of heat flows out to surroundings. Calculate the change in internal energy of the system.

 

A sample of an ideal gas undergoes a process (4 atm, 40 L) to (1 atm, 150 L). If the internal energy of gas decreases by 10 L-atm, H for the gas is